Zereshk – barberries – like memories – first need to be sorted through. Scatter them on a plate as you would dried legumes, and with a discerning eye pick out the older, shriveled and darker looking ones. Hang on to the bright crimson ones. Occasionally you might come across a small stone, pebble, or something of the sort. Give those the boot as well. While you’re at it remove the little stems too.